InChI=1S/C18H19ClN2/c1-2-10-5-11-7-12(6-10)17-16(8-11)21-15-9-13(19)3-4-14(15)18(17)20/h3-5,9,11-12H,2,6-8H2,1H3,(H2,20,21)/t11-,12+/m0/s1